Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6082433 | Control system and method for roll-up door | John J. Davis, James Anderson Smith | 2000-07-04 |
| 5865235 | Counterbalance mechanism for vertical opening door | Leroy G. Krupke, Douglas R. Fuller, Pierre-Louis Foucault | 1999-02-02 |
| 5857510 | Reinforced sectional door | Leroy G. Krupke, James L. Grisham, David Scott Boucher | 1999-01-12 |
| 5842508 | Hinge assembly for sectional door | Leroy G. Krupke, James L. Grisham, David Scott Boucher | 1998-12-01 |
| 5597987 | Twin post, telescoping jack hydraulic elevator system | Oscar Gilliland, Martin Hughes, Charlie Thurmond, Paul Tomes | 1997-01-28 |